CN210803221U

CN210803221U - Two-ring integrated double-ring water seepage test device

Info

Publication number: CN210803221U
Application number: CN201921431507.7U
Authority: CN
Inventors: 李博; 张文平; 武强; 杨磊
Original assignee: Guizhou University
Current assignee: Guizhou University
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-06-19
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a double-ring seepage test device with two integrated rings, which comprises an outer ring cylinder and an inner ring cylinder, wherein the top end of the outer ring cylinder is connected with a cover plate, the middle inner side is connected with a bottom plate, the bottom inner side is connected with a slow pressing layer, the inner ring cylinder is connected between the slow pressing layer and the bottom plate, a cavity between the bottom plate and the cover plate is a water injection tank, a water injection hole, a pressure transmission pipe and a level gauge are arranged on the cover plate, a gas channel I is arranged in the wall of the outer ring cylinder, a water quantity change detecting rod is connected at the outer side of the bottom end of the slow pressing layer, a communicating pipe is arranged in the slow pressing layer, the pressure transmission pipe is respectively communicated with the water quantity change detecting rod through the gas channel I and the communicating pipe, the inner ring water injection pipe and the outer ring water injection pipe are respectively communicated with the inner side and the outer side of the inner ring cylinder, a valve I and a flowmeter I are arranged on, and a water level sensor II is arranged on the bottom end surface, so that the measured penetration depth is more accurate.

Description

Two-ring integrated double-ring water seepage test device

Technical Field

The utility model relates to a dicyclo infiltration test device especially relates to a dicyclo infiltration test device of two rings an organic whole, belongs to hydrology geology and petrology, soil mechanics, hydraulics research technical field.

Background

The double-ring water seepage experiment can be used for measuring the permeability coefficient of a field rock-soil body, and belongs to a field in-situ experiment. The permeability coefficient of the rock-soil mass can play an extremely important role in engineering, and meanwhile, the accurate measurement of the permeability coefficient of the rock-soil mass can play an extremely important role in decision makers and has an absolute role in the design safety of engineering. At present, multiple types of double-ring water seepage experiment quasi-devices are available on the market. However, the existing double-ring water seepage implementation device has a large defect, firstly, in the experiment process, in order to avoid the washing of the bottom soil layer, a pebble layer is paved at the bottom before the experiment, so that the limitation of local conditions is realized, and the operation is complicated; secondly, the double rings and the water injection tank are separated from each other and are not integrated, so that the carrying is inconvenient; third, the penetration depth cannot be measured accurately, but the penetration coefficient is calculated by estimating the penetration depth, resulting in deviation of the test results. The above is a problem to be solved.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the double-ring seepage test device with the two rings integrated is provided, the inner ring and the outer ring of the double-ring seepage test device are connected into a whole through the pressure-relieving layer, and the effect of water in the double-ring seepage test on the scouring of the soil body on the surface layer of a test pit is eliminated; the change of the water content of the soil can be accurately monitored through the water quantity change detection rod, and the final penetration depth is calculated; simultaneously, the arc-shaped annular plate of the water volume change monitoring device is controlled by the pressure of the pressure delivery pipe, the effect of multiple measurement is achieved, the measured penetration depth is more accurate, the whole double-ring water seepage testing device is based on an integration, the structure is simple, the operation is simple and convenient, the carrying is convenient, the safety performance is high, and the existing problems are effectively solved.

The technical scheme of the utility model is that: a double-ring water seepage test device with two integrated rings comprises an outer ring cylinder and an inner ring cylinder, wherein a top end fixed connection cover plate of the outer ring cylinder, a middle inner side fixed connection box bottom plate, a bottom end inner side is connected with a slow pressing layer, the inner ring cylinder is connected between the slow pressing layer and the box bottom plate, a cavity between the box bottom plate and the cover plate is a water injection box, a water injection hole, a pressure transmission pipe and a level gauge are arranged on the cover plate, a gas channel I is arranged in the wall of the outer ring cylinder, a water quantity change detection rod is connected to the bottom outer side of the slow pressing layer, a communication pipe is arranged in the slow pressing layer, the pressure transmission pipe is respectively communicated with the water quantity change detection rod through the gas channel I and the communication pipe, the inner ring water injection pipe and the outer ring water injection pipe are fixedly connected to the bottom end of the box bottom plate and are respectively communicated with the inner side and the outer side of the inner ring cylinder, a valve I and, a water level sensor II is arranged on the bottom end surface.

The slow-pressing layer comprises an upper filter plate, a packing layer and a lower filter plate, the packing layer is arranged between the upper filter plate and the lower filter plate, the outer side of the upper filter plate is fixedly connected with the inner side wall of the outer ring cylinder, the bottom end of the inner ring cylinder is fixedly connected onto the upper end face of the upper filter plate, the outer side of the lower filter plate is fixedly connected onto the inner side wall of the outer ring cylinder, a hole is formed in the middle of the lower filter plate, the communicating pipe penetrates through one end of the packing layer to be connected onto the inner wall of the outer ring cylinder, the other end of the communicating pipe is.

The water volume change detection rod comprises a connecting end, a water volume change detection unit and a bottom cone body, wherein the outer side of the connecting end is provided with threads and is connected onto the outer side wall of the hole, a gas circulation hole is formed in the middle of the connecting end and is communicated with a pressure delivery pipe, the bottom end of the connecting end is fixedly connected with a plurality of water volume change detection units which are connected in series and fixedly connected, and the bottom end of the water volume change detection unit at the bottom is fixedly connected with the bottom cone body.

The water quantity change detection unit comprises an upper barrel, a gate valve, a lower outer barrel and a lower inner barrel, wherein the lower outer barrel is sleeved on the outer side of the lower inner barrel and is fixedly connected with the outer side of the lower inner barrel through two symmetrical clapboards, the bottom end of the lower outer barrel is fixedly connected with a bottom plate, two symmetrical cavity bodies are arranged between the lower outer barrel and the lower inner barrel, a rotatable arc-shaped annular plate is arranged on the side edge of each cavity body, an arc-shaped cavity is arranged between each arc-shaped annular plate and each clapboard, each arc-shaped annular plate can rotate into the arc-shaped cavity, the top ends of the lower outer barrel and the lower inner barrel are connected with the upper barrel through the gate valve, a filter plate is fixedly connected with the inner side of the bottom of the upper barrel, a top plate is fixedly connected with the inner side of the top end of the upper barrel, a piston plate capable of moving up and down is arranged between the top, the upper ends of the two gas channels are communicated with the gas circulation holes, chemical reagents are filled in the cavity between the filter plate and the gate valve, the strong water absorption reagents are filled in the cavity between the lower inner cylinder and the gate valve, a plurality of filtering holes are formed in the side walls of the lower inner cylinder and the lower outer cylinder under the inner side and the outer side of the arc-shaped cavity, water in soil can enter the lower inner cylinder through the filtering holes, springs are arranged between the filter plate and the partition plate, a plurality of water quantity change detection units are vertically overlapped and fixedly connected, and the surface F of the previous water quantity change detection unit coincides with the surface H of the next water quantity change detection unit.

The cover plate is provided with a control unit, and the control unit is electrically connected with the first valve, the first flowmeter, the second valve, the second flowmeter, the first water level sensor, the second water level sensor, the distance measuring probe and the gate valve.

The utility model has the advantages that: compared with the prior art, adopt the technical scheme of the utility model, compare with the dicyclo infiltration test device that market is current, this test device has reduced test pit surface ground body because of the shadow of water conservancy washing to the test result through the layer of releiving, has also eliminated the test device simultaneously and has placed the influence of irregularity to the test result. In addition, the infiltration depth of the part can be accurately detected through the water quantity change detection needle, the defect that the infiltration depth is estimated through experience in the traditional double-ring infiltration test is overcome, the precision of the infiltration test is improved, and the water quantity change detection rod can be set in different specifications according to the field measurement purpose. In addition, whole testing arrangement is based on an organic whole, conveniently carries, and convenient dismantlement installation, has obtained fine result of use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a schematic view of the water volume change probe of the present invention;

FIG. 4 is a top view of the water volume change probe of the present invention;

FIG. 5 is a sectional view of the water volume change probe rod A-A of the present invention (the arc-shaped ring plate is opened);

fig. 6 is a sectional view of the water volume change detecting rod a-a of the present invention (closed state of the arc-shaped ring plate).

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Example 1: as shown in the attached figures 1-6, a double-ring water seepage test device with two rings integrated comprises an outer ring cylinder 3 and an inner ring cylinder 2, wherein the top end of the outer ring cylinder 3 is fixedly connected with a cover plate 5, the inner side of the middle part is fixedly connected with a box bottom plate 41, the inner side of the bottom end is connected with a pressure-reducing layer 9, the inner ring cylinder 2 is connected between the pressure-reducing layer 9 and the box bottom plate 41, a cavity between the box bottom plate 41 and the cover plate 5 is a water injection tank 1, the cover plate 5 is provided with a water injection hole 6, a pressure-delivery pipe 7 and a leveling instrument 27, the wall of the outer ring cylinder 3 is provided with a gas passage one 30, the outer side of the bottom end of the pressure-reducing layer 9 is connected with a water quantity change detection rod 4, the pressure-delivery pipe 9 is provided with a communication pipe 39, the pressure-delivery pipe 7 is respectively communicated with the water quantity change detection rod 4 through the gas passage one 30 and the communication pipe 39, the inner ring water injection pipe 8 is provided with a first valve 32 and a first flowmeter 33, the bottom end surface is provided with a first water level sensor 35, the outer ring water injection pipe 89 is provided with a second valve 31 and a second flowmeter 34, and the bottom end surface is provided with a second water level sensor 36.

Further, the slow pressing layer 9 comprises an upper filter plate 37, a packing layer 40 and a lower filter plate 38, the packing layer 40 is arranged between the upper filter plate 37 and the lower filter plate 38, the outer side of the upper filter plate 37 is fixedly connected with the inner side wall of the outer ring cylinder 3, the bottom end of the inner ring cylinder 2 is fixedly connected to the upper end face of the upper filter plate 37, the outer side of the lower filter plate 38 is fixedly connected to the inner side wall of the outer ring cylinder 3, a hole 42 is formed in the middle of the lower filter plate 38, the communicating pipe 39 penetrates through one end of the packing layer 40 to be connected to the inner wall of the outer ring cylinder 3, the other end of the communicating pipe is connected to the hole 42 in the middle of the. The packing layer 40 is a material which does not absorb water and has a large porosity, such as pebbles.

Further, the water volume change detection rod 4 comprises a connecting end 26, a water volume change detection unit and a bottom cone 20, wherein the outer side of the connecting end 26 is threaded and connected to the outer side wall of the hole 42, a gas circulation hole 11 is formed in the middle of the connecting end 26 and is communicated with the pressure delivery pipe 7, a plurality of water volume change detection units which are connected in series and fixedly connected are fixedly connected to the bottom end of the connecting end 26, and the bottom end of the water volume change detection unit at the bottom is fixedly connected with the bottom cone 20. The water volume change detection rod 4 is provided with water volume change detection units every 10cm from the top downwards.

Further, the water amount change detection unit comprises an upper barrel 13, a gate valve 15, a lower outer barrel 16 and a lower inner barrel 17, the lower outer barrel 16 is sleeved outside the lower inner barrel 17 and fixedly connected through two symmetrical partition plates 25, the bottom end is fixedly connected with a bottom plate 19, two symmetrical cavity bodies 18 are arranged between the lower outer barrel 16 and the lower inner barrel 17, a rotatable arc-shaped annular plate 24 is arranged on the side edge of each cavity body 18, an arc-shaped cavity 51 is arranged between each arc-shaped annular plate 24 and each partition plate 25, each arc-shaped annular plate 24 can rotate into each arc-shaped cavity 51, the top ends of the lower outer barrel 16 and the lower inner barrel 17 are connected with the upper barrel 13 through the gate valve 15, a filter plate 14 is fixedly connected to the inner side of the bottom of the upper barrel 13, a top plate 23 is fixedly connected to the inner side of the top end of the upper barrel 13, a piston plate 12 capable of moving up and down is arranged between the top plate 23 and the filter plate 14, the initial state of the piston, the wall of the upper barrel 13 is provided with symmetrical gas channels II 10, the gas channels II 10 penetrate through the gate valve 15 to be communicated with the cavity body 18, the upper end of the gas channel II 10 is communicated with the gas circulation hole 11, a chemical reagent 22 is filled in a cavity between the filter plate 14 and the gate valve 15, a reagent 21 which absorbs water strongly is filled in a cavity between the lower inner barrel 17 and the gate valve 15, the side walls of the lower inner barrel 17 and the lower outer barrel 16 on the inner side and the outer side of the arc-shaped cavity 51 are provided with a plurality of filtering holes, water in soil can enter the lower inner barrel 17 through the filtering holes, a spring is arranged between the filter plate 14 and the partition plate 25, a plurality of water volume change detection units are overlapped and fixedly connected up and down, and the surface F of the previous water volume change detection unit is overlapped with the surface H of the next water volume change. The chemical agent 22 is a chemical agent that chemically reacts with water to produce a gas having a relatively low density.

Further, the agent 21 which strongly absorbs water is montmorillonite.

Further, the pressure transmission pipe 7 is supplied with air by an external air source and used as a controlled air source, and the arc-shaped annular plate 24 can be pushed to move into the arc-shaped cavity 51 by supplying air inwards, so that the filtering holes in the side walls of the lower inner cylinder 17 and the lower outer cylinder 16 on the inner side and the outer side of the arc-shaped cavity 51 can be sealed, and the moisture in the soil is prevented from flowing into the device. When the air supply is shut off, the arcuate ring plate 24 is returned to its original position under the influence of the extension spring.

Further, a control unit is arranged on the cover plate 5 and is electrically connected with the first valve 32, the first flowmeter 33, the second valve 31, the second flowmeter 34, the first water level sensor 35, the second water level sensor 36, the distance measuring probe 28 and the gate valve 15.

An operation method of a double-ring water seepage test device with two rings integrated, comprising the following steps: firstly, installing a testing device: according to a field test site, excavating a test pit to ensure that the bottom of the test pit is flat, vertically disassembling a water quantity change detection rod 4 into the test pit, placing the device into the test pit to enable a pressure relief layer at the bottom of the device to contact the bottom of the test pit, connecting the device with the water quantity change detection rod 4, observing through a level gauge 27, and adjusting the level of the test device; secondly, measuring the initial soil water content: opening a control unit, and measuring the water quantity of the initial rock-soil body; thirdly, permeability coefficient measurement: connecting a water injection tank 1 with an external water source, always ensuring that sufficient water exists in the water injection tank 1, opening a permeability coefficient measuring switch of a control unit, injecting water into an inner ring and an outer ring, enabling the water to be always at the same level with a water level sensor below a water injection hole of the inner ring and the outer ring, ensuring that the water levels of the inner ring and the outer ring are always consistent, measuring and recording changes of inner ring flow, outer ring flow and soil body water content once every five minutes by a test device, continuously recording for five times after infiltration is stabilized, and taking the average value of the permeability coefficient obtained according to the five times of data to obtain the soil permeability coefficient; fourthly, disassembling the experimental device: the water in the water injection tank 1, the inner ring and the outer ring is completely drained, the test device is taken down, the water quantity change detection rod 4 is pulled out, and the test is completed.

The working principle of the test device is as follows: after the whole test device is installed, measuring the initial soil water amount, opening all the arc-shaped annular plates 24 of the water amount change detection units on the water amount change detection rod 4 to enable water in soil to enter the lower inner cylinder 17, introducing gas into the pressure transmission pipe 7 after one minute to push the arc-shaped annular plates 24 to seal the lower inner cylinder 17, recording the initial position of the piston plate 12 through the distance measurement probe 28, and recording the initial position as X₁The control unit opens the gate valve 15 to react the absorbed moisture with the chemical agent 22, the generated gas pushes the piston plate 12 upward, and the distance measuring probe 28 records the final displacement position X₂The final travel distance of the piston plate 12 can be measured as Δ X = X₁-X₂. Fill up water in to water injection tank 1 through water injection hole 6, open valve 32 and valve 32 through the control unit, simultaneously to inside and outside annular chamber water injection, detect through water level inductor 35 and water level inductor two 36 and can make the water level in interior ring section of thick bamboo 2 and the outer ring section of thick bamboo 3 the same, treat that the infiltration is stable after, the flow of interior ring section of thick bamboo 2 and outer ring section of thick bamboo 3 of five minute record every, the water level is once, and measure the soil water yield as above-mentioned initial water yield step of measuring soil, with this repeated five times, the test stops. And calculating the final penetration depth according to the size of the delta X of the adjacent water quantity change detection unit, and calculating the penetration coefficient according to Darcy's law.

The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides an integrative dicyclo infiltration test device of two rings which characterized in that: it includes outer ring section of thick bamboo (3) and interior ring section of thick bamboo (2), top fixed connection apron (5) of outer ring section of thick bamboo (3), inboard fixed connection bottom of the case board (41) of middle part, the bottom inboard is connected with slowly-pressing layer (9), connect interior ring section of thick bamboo (2) between slowly-pressing layer (9) and bottom of the case board (41), the cavity between bottom of the case board (41) and apron (5) is water injection case (1), be equipped with water injection hole (6) on apron (5), defeated pressure pipe (7) and spirit level (27), be equipped with gas passage (30) in outer ring section of thick bamboo (3) wall, be connected with water yield change probe rod (4) in the bottom outside of slowly-pressing layer (9), there are communicating pipe (39) in slowly-pressing layer (9), defeated pressure pipe (7) are respectively through gas passage (30), communicating pipe (39) and water yield change probe rod (4) intercommunication, bottom fixed connection inner ring water injection pipe (8) and outer ring section of thick bamboo (89) and respectively with the interior ring section of thick bamboo The inner side is communicated with the outer side, a first valve (32) and a first flowmeter (33) are arranged on the inner ring water injection pipe (8), a first water level sensor (35) is arranged on the bottom end face, a second valve (31) and a second flowmeter (34) are arranged on the outer ring water injection pipe (89), and a second water level sensor (36) is arranged on the bottom end face.

2. The two-ring integrated double-ring water seepage test device according to claim 1, wherein: the slow-pressing layer (9) comprises an upper filter plate (37), a packing layer (40) and a lower filter plate (38), the packing layer (40) is arranged between the upper filter plate (37) and the lower filter plate (38), the outer side of the upper filter plate (37) is fixedly connected with the inner side wall of an outer ring cylinder (3), the bottom end of an inner ring cylinder (2) is fixedly connected onto the upper end face of the upper filter plate (37), the outer side of the lower filter plate (38) is fixedly connected onto the inner side wall of the outer ring cylinder (3), a hole (42) is formed in the middle of the lower filter plate (38), a communication pipe (39) penetrates through one end of the packing layer (40) to be connected onto the inner wall of the outer ring cylinder (3), the other end of the communication pipe is connected onto the hole (42) in the middle of the lower filter plate (38).

3. The two-ring integrated double-ring water seepage test device according to claim 1, wherein: the water volume change detection rod (4) comprises a connecting end (26), a water volume change detection unit and a bottom cone body (20), wherein the outer side of the connecting end (26) is provided with threads and is connected onto the outer side wall of a hole (42), a gas circulation hole (11) is formed in the middle of the connecting end (26) and is communicated with a pressure delivery pipe (7), the bottom end of the connecting end (26) is fixedly connected with a plurality of water volume change detection units which are connected in series and fixedly connected, and the bottom end of the water volume change detection unit at the bottom is fixedly connected with the bottom cone body (20).

4. The two-ring integrated double-ring water seepage test device according to claim 3, wherein: the water quantity change detection unit comprises an upper barrel body (13), a gate valve (15), a lower outer barrel (16) and a lower inner barrel (17), wherein the lower outer barrel (16) is sleeved outside the lower inner barrel (17) and is fixedly connected with the lower inner barrel through two symmetrical partition plates (25), a bottom end is fixedly connected with a bottom plate (19), two symmetrical cavity bodies (18) are arranged between the lower outer barrel (16) and the lower inner barrel (17), a rotatable arc-shaped annular plate (24) is arranged on the side edge of each cavity body (18), an arc-shaped cavity (51) is arranged between each arc-shaped annular plate (24) and each partition plate (25), each arc-shaped annular plate (24) can rotate into the arc-shaped cavity (51), the top ends of the lower outer barrel (16) and the lower inner barrel (17) are connected with the upper barrel body (13) through the gate valve (15), a filter plate (14) is fixedly connected to the inner side of the bottom of the upper barrel body (13), and a top, a piston plate (12) capable of moving up and down is arranged between a top plate (23) and a filter plate (14), a distance measuring probe (28) capable of measuring the position of the piston plate (12) is arranged on the bottom end face of the top plate (23), symmetrical gas channels II (10) are arranged on the wall of an upper barrel body (13), the gas channels II (10) penetrate through a gate valve (15) and are communicated with a cavity body (18), the upper ends of the gas channels II (10) are communicated with a gas circulation hole (11), a chemical reagent (22) is filled in a cavity between the filter plate (14) and the gate valve (15), a reagent (21) for strong water absorption is filled in the cavity between a lower inner barrel (17) and the gate valve (15), a plurality of filter holes are arranged on the side walls of the lower inner barrel (17) and the lower outer barrel (16) on the inner and outer sides of an arc-shaped cavity (51), and water in soil can enter the lower inner barrel (17), a spring is arranged between the filter plate (14) and the partition plate (25), a plurality of water quantity change detection units are vertically overlapped and fixedly connected, and the surface F of the previous water quantity change detection unit is superposed with the surface H of the next water quantity change detection unit.

5. The two-ring integrated double-ring water seepage test device according to claim 1, wherein: the cover plate (5) is provided with a control unit, and the control unit is electrically connected with the first valve (32), the first flowmeter (33), the second valve (31), the second flowmeter (34), the first water level sensor (35), the second water level sensor (36), the distance measuring probe (28) and the gate valve (15).